US4645255A - Load hook - Google Patents

Load hook Download PDF

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Publication number
US4645255A
US4645255A US06/852,403 US85240386A US4645255A US 4645255 A US4645255 A US 4645255A US 85240386 A US85240386 A US 85240386A US 4645255 A US4645255 A US 4645255A
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US
United States
Prior art keywords
hook
semi
arm
load
safety catch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/852,403
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English (en)
Inventor
Hans R. Zepf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US4645255A publication Critical patent/US4645255A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B45/00—Hooks; Eyes
    • F16B45/02—Hooks with pivoting or elastically bending closing member
    • F16B45/023—Hooks with pivoting or elastically bending closing member the closing member pivoting about an axis perpendicular to the plane of the hook
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads

Definitions

  • the invention relates to a load hook for load application in two approximately opposite directions, provided with a safety catch and with a base part for fixing to a lifting apparatus, particularly to a dredging or excavating shovel or bucket, the safety catch and the hook mouth covered by the safety catch for inserting a chain link or cable flange being arranged on the side and in the vicinity of the base part.
  • the load hook must be constructed in such a way that it still remains operable when introduced into the soil several times. For this reason in a known load hook of this type the hook mouth is positioned on the side of the attachment point.
  • a disadvantage of this load hook is the kidney-shaped configuration of the hook space surrounded by the hook body. When load is applied to the two ends of this hook space, additional bending forces occur which attempt to stretch the kidney-shaped hook space.
  • a further disadvantage is that the kidney-shaped hook space limits the insertion width to the hook mouth, so that the base part, with the aid of which the load hook is fixed to the lifting apparatus is connected to the hook body in such a way that the latter is at a distance from the bearing surface of the base part.
  • the problem of the present invention is to so further develop the load hook of the type described hereinbefore that the above-mentioned disadvantages do not occur and that for comparable relative sizes the load hook can be designed for a much higher permitted load and at the same time the lateral stability, i.e. the usability when lateral forces occur, is improved. Furthermore there is a material saving, without impairing access to the hook mouth.
  • the base part is formed by part of the hook body surrounding a free elongated hook space, whose longitudinal axis is inclined towards and away from the bearing surface of the base part.
  • FIG. 1 a side view of a load hook according to the invention.
  • FIG. 2 a cross-section through the load hook of FIG. 1 along line II--II.
  • FIG. 3 a cross-section through the load hook of FIG. 1 along the line III--III.
  • FIG. 4 a plan view of a safety catch for locking the hook mouth.
  • FIG. 5 a cross-section similar to that of FIG. 2 for a load hook for fastening to its attachment point.
  • the load hook shown in FIG. 1 has an annular hook body 1 with an oval shape surrounding an elongated, oval hook space 2.
  • the hook body 1 forms on one side a base part 5, which at its free end carries a pivotable safety catch 6.
  • Safety catch 6 locks a hook mouth 3 formed by the hook body 1 and through which can be inserted a chain link or a cable flange for raising loads.
  • the safety catch 6 has two arms 7 by means of which it can be pivoted to the base part 5 of hook body 1 using a bolt 8.
  • the safety catch 6 has a recess 10 for material saving purposes and whose rectangular shape can be seen in FIG. 4.
  • the safety catch 6 has a curved and inclined edge 9, which is supported on an inclined surface 16 of hook body 1.
  • the safety catch 6 is pressed by a not shown spring onto the inclined surface 16.
  • a spring with a bracket mounted on the bolt and which is supported on a supporting edge arranged between the arms 7, whilst the ends of the spring are supported on the base part 5.
  • hook space 2 has a longitudinal axis 4 which is directed away from the bearing surface of base part 5.
  • the bearing surface 11 is slightly curved and forms bearing points 12, 13 at the narrow sides.
  • the bearing point 13 and in the same way the bearing point 12 is approximately a plane of limited extension.
  • the edges of the base part have rounded portions 18.
  • the weld on the base part 5 can be made sufficiently large and, due to the rounded portions 18 can be effected in a reliable manner, certain national safety regulations prescribe a weld not only within the hook body, but also at the mounting or attachment point.
  • shoulders 19 are provided or the hook profile 20 on the longitudinal edges of base part 5 and in the area thereof tapped holes 22 are provided. If for example the load hook is fixed to the shovel or bucket of an excavator or dredge, tapped holes 22 are provided in corresponding manner to the bores in the bucket or shovel and the load hook is secured by screws introduced from the inside.
  • hook profile 20 has further shoulders 24 on either side and which, as shown in FIG. 1, extend over most of the hook body 1.
  • the inner boundary of hook space 2 is greatly rounded, so that no additional stresses can occur on the inserted chain link or cable flange.
  • axis 4 of hook space 2 it is important for axis 4 of hook space 2 to be inclined away from the bearing surface 11 of base part 5.
  • the hook body is given a suitable configuration, which on the one hand facilitates the insertion of a chain link or cable flange, because the axis also simultaneously assumes the approximate direction of the load forces applied and on the other prevents the occurrence of additional bending stresses.
  • the base part 5 can essentially be constructed as part of the hook body 1 and a considerable material accumulation at base part 5 is avoided. Since as a result of this the distance from the bearing surface 11 to the force application point can be kept small, the load hook can also absorb much larger lateral forces, i.e. the lateral stability is increased.
  • the said load hook can be used for larger loads.
  • load hooks of identical size according to the prior art and according to the invention were compared.
  • the first is designed for 8 t with a 3.6 time safety margin, whilst the latter is designed for 10 t and a 4.5 time safety margin, which corresponds to a load of 12.5 t, with the same safety margin.
  • This great increase in the permitted load is achieved with a decrease and not an increase in material expenditure.
  • the load hook described hereinbefore is preferably constructed as a forging, as is the safety catch 6.
  • the curved edge 9 of the safety catch 6 is used for the centering thereof, because the arms 7 are not laterally guided in bolt 8 and instead between them space is available for the provision of a locking spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Massaging Devices (AREA)
  • Vehicle Body Suspensions (AREA)
  • Finger-Pressure Massage (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Shovels (AREA)
  • Emergency Lowering Means (AREA)
US06/852,403 1978-06-16 1986-04-16 Load hook Expired - Fee Related US4645255A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2826541A DE2826541C2 (de) 1978-06-16 1978-06-16 Lasthaken
DE2826541 1978-06-16

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06191332 Continuation 1980-02-16

Publications (1)

Publication Number Publication Date
US4645255A true US4645255A (en) 1987-02-24

Family

ID=6041999

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/852,403 Expired - Fee Related US4645255A (en) 1978-06-16 1986-04-16 Load hook

Country Status (13)

Country Link
US (1) US4645255A (sv)
EP (1) EP0016027B1 (sv)
AT (1) AT356595B (sv)
CA (1) CA1112028A (sv)
CH (1) CH641123A5 (sv)
DE (1) DE2826541C2 (sv)
DK (1) DK150348C (sv)
ES (1) ES478441A1 (sv)
FI (1) FI67682C (sv)
IT (1) IT1121420B (sv)
NO (1) NO150849C (sv)
SE (1) SE446718B (sv)
WO (1) WO1980000075A1 (sv)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977647A (en) * 1989-10-27 1990-12-18 D.B. Industries, Inc. Double locking snap hook
USD381889S (en) * 1995-12-27 1997-08-05 Gunnebo Industrier Ab Excavator hook
US6412698B2 (en) * 1999-03-16 2002-07-02 Psc Scanning, Inc. Attachment device for ergonomically suspending a handheld scanner
US6622354B1 (en) * 2002-05-13 2003-09-23 Gregory L. Klingier Carabiner
US7992267B2 (en) 2006-06-26 2011-08-09 Tony Christianson Snap lock carabiner
US8752254B2 (en) 2012-02-28 2014-06-17 D B Industries, Llc Snap hook
US9707419B2 (en) 2014-10-08 2017-07-18 D B Industries, Llc Snap hook

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583731B1 (fr) * 1985-06-20 1988-03-25 Lorraine Laminage Crochet de levage pour appareils a prehension automatique.

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL11843C (sv) *
US1386894A (en) * 1920-07-27 1921-08-09 Myrmo Ole Choker-hook
US1411230A (en) * 1921-07-06 1922-03-28 Weber Tobias Coupling
US1616350A (en) * 1923-11-23 1927-02-01 Clavier Pierre Hook for breast collars
US1678993A (en) * 1928-01-18 1928-07-31 John R Marshall Hook
US1702830A (en) * 1927-03-15 1929-02-19 Frank N Jordan Drawbar coupling
US2491143A (en) * 1947-01-17 1949-12-13 Dewey S Weiss Coupler hook
DE902545C (de) * 1951-08-29 1954-01-25 Heuer Hammer Schwerschmieden B Karabinerhaken fuer grosse Lasten
US3159891A (en) * 1962-07-26 1964-12-08 Jess A Brewer Fireman's coat clasp
US3317972A (en) * 1964-02-24 1967-05-09 Harley Patents Int Connectors
US3421642A (en) * 1967-02-08 1969-01-14 Jack D Carter Fork lift attachment for a movable bucket
US3814269A (en) * 1972-05-30 1974-06-04 Caterpillar Tractor Co Hook for excavator buckets
US3831229A (en) * 1973-02-20 1974-08-27 Stanadyne Inc Environment free snap hook

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR957974A (sv) * 1950-03-02
US2503522A (en) * 1947-08-14 1950-04-11 Donald K Struthers Tractor mounted manure loader
US3587887A (en) * 1969-07-03 1971-06-28 John P De Carli Bucket loader attachment
FR2228903A1 (en) * 1973-05-11 1974-12-06 Jaubert Olivier Lifting device for drain pipes - hooks onto bucket of hydraulic digger which is lowered into trench
DE7640118U1 (de) * 1976-12-22 1977-09-22 K A Bergs Smide Ab, Gemla (Schweden) Lasthaken

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL11843C (sv) *
US1386894A (en) * 1920-07-27 1921-08-09 Myrmo Ole Choker-hook
US1411230A (en) * 1921-07-06 1922-03-28 Weber Tobias Coupling
US1616350A (en) * 1923-11-23 1927-02-01 Clavier Pierre Hook for breast collars
US1702830A (en) * 1927-03-15 1929-02-19 Frank N Jordan Drawbar coupling
US1678993A (en) * 1928-01-18 1928-07-31 John R Marshall Hook
US2491143A (en) * 1947-01-17 1949-12-13 Dewey S Weiss Coupler hook
DE902545C (de) * 1951-08-29 1954-01-25 Heuer Hammer Schwerschmieden B Karabinerhaken fuer grosse Lasten
US3159891A (en) * 1962-07-26 1964-12-08 Jess A Brewer Fireman's coat clasp
US3317972A (en) * 1964-02-24 1967-05-09 Harley Patents Int Connectors
US3421642A (en) * 1967-02-08 1969-01-14 Jack D Carter Fork lift attachment for a movable bucket
US3814269A (en) * 1972-05-30 1974-06-04 Caterpillar Tractor Co Hook for excavator buckets
US3831229A (en) * 1973-02-20 1974-08-27 Stanadyne Inc Environment free snap hook

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977647A (en) * 1989-10-27 1990-12-18 D.B. Industries, Inc. Double locking snap hook
USD381889S (en) * 1995-12-27 1997-08-05 Gunnebo Industrier Ab Excavator hook
US6412698B2 (en) * 1999-03-16 2002-07-02 Psc Scanning, Inc. Attachment device for ergonomically suspending a handheld scanner
US6622354B1 (en) * 2002-05-13 2003-09-23 Gregory L. Klingier Carabiner
US7992267B2 (en) 2006-06-26 2011-08-09 Tony Christianson Snap lock carabiner
US8752254B2 (en) 2012-02-28 2014-06-17 D B Industries, Llc Snap hook
US9328765B2 (en) 2012-02-28 2016-05-03 D B Industries, Llc Snap hook
US9707419B2 (en) 2014-10-08 2017-07-18 D B Industries, Llc Snap hook
US10086221B2 (en) 2014-10-08 2018-10-02 D B Industries, Llc Snap hook

Also Published As

Publication number Publication date
DE2826541C2 (de) 1987-01-15
DK150348C (da) 1988-01-11
IT1121420B (it) 1986-04-02
NO791995L (no) 1979-12-18
NO150849C (no) 1985-01-09
FI791780A (fi) 1979-12-17
CA1112028A (en) 1981-11-10
EP0016027B1 (de) 1982-09-22
CH641123A5 (de) 1984-02-15
WO1980000075A1 (fr) 1980-01-24
ES478441A1 (es) 1979-07-01
AT356595B (de) 1980-05-12
DE2826541A1 (de) 1980-01-03
ATA623878A (de) 1979-09-15
EP0016027A1 (de) 1980-10-01
NO150849B (no) 1984-09-17
DK252079A (da) 1979-12-17
FI67682C (fi) 1985-05-10
SE446718B (sv) 1986-10-06
FI67682B (fi) 1985-01-31
IT7923618A0 (it) 1979-06-15
SE8001232L (sv) 1980-02-15
DK150348B (da) 1987-02-09

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Free format text: PAT HOLDER CLAIMS SMALL ENTITY STATUS - SMALL BUSINESS (ORIGINAL EVENT CODE: SM02); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY

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Year of fee payment: 4

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Effective date: 19950301

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362